These illustration work only when it rains

These illustration work only when it rains

Water-activated interactive artworks, illustrations, and hidden messages are perfectly at home in rainy Seattle. Titled Rainworks, the invisible pieces by Seattle-based artist Peregrine Church started popping up last year. Each installation is made from an environmentally safe, water-repellent coating that lasts from a year to 4 months. You can see more here.